2 * COPYRIGHT: See COPYING in the top level directory
3 * PROJECT: ReactOS kernel
4 * FILE: drivers/fs/np/rw.c
5 * PURPOSE: Named pipe filesystem
6 * PROGRAMMER: David Welch <welch@cwcom.net>
9 /* INCLUDES ******************************************************************/
16 /* FUNCTIONS *****************************************************************/
19 VOID
HexDump(PUCHAR Buffer
, ULONG Length
)
23 const char Hex
[] = "0123456789ABCDEF";
26 DbgPrint("---------------\n");
28 for (i
= 0; i
< Length
; i
+= 16)
30 memset(Line
, ' ', 64);
33 for (j
= 0; j
< 16 && j
+ i
< Length
; j
++)
36 Line
[3*j
+ 0] = Hex
[ch
>> 4];
37 Line
[3*j
+ 1] = Hex
[ch
& 0x0f];
38 Line
[48 + j
] = isprint(ch
) ? ch
: '.';
40 DbgPrint("%s\n", Line
);
42 DbgPrint("---------------\n");
47 NpfsReadWriteCancelRoutine(IN PDEVICE_OBJECT DeviceObject
,
50 PNPFS_CONTEXT Context
;
51 PNPFS_DEVICE_EXTENSION DeviceExt
;
52 PIO_STACK_LOCATION IoStack
;
54 BOOLEAN Complete
= FALSE
;
56 DPRINT("NpfsReadWriteCancelRoutine(DeviceObject %x, Irp %x)\n", DeviceObject
, Irp
);
58 IoReleaseCancelSpinLock(Irp
->CancelIrql
);
60 Context
= (PNPFS_CONTEXT
)&Irp
->Tail
.Overlay
.DriverContext
;
61 DeviceExt
= (PNPFS_DEVICE_EXTENSION
)DeviceObject
->DeviceExtension
;
62 IoStack
= IoGetCurrentIrpStackLocation(Irp
);
63 Ccb
= IoStack
->FileObject
->FsContext2
;
65 KeLockMutex(&DeviceExt
->PipeListLock
);
66 ExAcquireFastMutex(&Ccb
->DataListLock
);
67 switch(IoStack
->MajorFunction
)
70 if (Ccb
->ReadRequestListHead
.Flink
!= &Context
->ListEntry
)
72 /* we are not the first in the list, remove an complete us */
73 RemoveEntryList(&Context
->ListEntry
);
78 KeSetEvent(&Ccb
->ReadEvent
, IO_NO_INCREMENT
, FALSE
);
84 ExReleaseFastMutex(&Ccb
->DataListLock
);
85 KeUnlockMutex(&DeviceExt
->PipeListLock
);
88 Irp
->IoStatus
.Status
= STATUS_CANCELLED
;
89 Irp
->IoStatus
.Information
= 0;
90 IoCompleteRequest(Irp
, IO_NO_INCREMENT
);
95 NpfsWaiterThread(PVOID InitContext
)
97 PNPFS_THREAD_CONTEXT ThreadContext
= (PNPFS_THREAD_CONTEXT
) InitContext
;
103 BOOLEAN Terminate
= FALSE
;
104 BOOLEAN Cancel
= FALSE
;
105 PIO_STACK_LOCATION IoStack
= NULL
;
106 PNPFS_CONTEXT Context
;
107 PNPFS_CONTEXT NextContext
;
110 KeLockMutex(&ThreadContext
->DeviceExt
->PipeListLock
);
114 CurrentCount
= ThreadContext
->Count
;
115 KeUnlockMutex(&ThreadContext
->DeviceExt
->PipeListLock
);
120 Irp
->IoStatus
.Status
= STATUS_CANCELLED
;
121 Irp
->IoStatus
.Information
= 0;
122 IoCompleteRequest(Irp
, IO_NO_INCREMENT
);
126 switch (IoStack
->MajorFunction
)
129 NpfsRead(IoStack
->DeviceObject
, Irp
);
140 Status
= KeWaitForMultipleObjects(CurrentCount
,
141 ThreadContext
->WaitObjectArray
,
147 ThreadContext
->WaitBlockArray
);
148 if (!NT_SUCCESS(Status
))
152 KeLockMutex(&ThreadContext
->DeviceExt
->PipeListLock
);
153 Count
= Status
- STATUS_SUCCESS
;
154 ASSERT (Count
< CurrentCount
);
157 Irp
= ThreadContext
->WaitIrpArray
[Count
];
158 ThreadContext
->Count
--;
159 ThreadContext
->DeviceExt
->EmptyWaiterCount
++;
160 ThreadContext
->WaitObjectArray
[Count
] = ThreadContext
->WaitObjectArray
[ThreadContext
->Count
];
161 ThreadContext
->WaitIrpArray
[Count
] = ThreadContext
->WaitIrpArray
[ThreadContext
->Count
];
163 Cancel
= (NULL
== IoSetCancelRoutine(Irp
, NULL
));
164 Context
= (PNPFS_CONTEXT
)&Irp
->Tail
.Overlay
.DriverContext
;
165 IoStack
= IoGetCurrentIrpStackLocation(Irp
);
169 Ccb
= IoStack
->FileObject
->FsContext2
;
170 ExAcquireFastMutex(&Ccb
->DataListLock
);
171 RemoveEntryList(&Context
->ListEntry
);
172 switch (IoStack
->MajorFunction
)
175 if (!IsListEmpty(&Ccb
->ReadRequestListHead
))
177 /* put the next request on the wait list */
178 NextContext
= CONTAINING_RECORD(Ccb
->ReadRequestListHead
.Flink
, NPFS_CONTEXT
, ListEntry
);
179 ThreadContext
->WaitObjectArray
[ThreadContext
->Count
] = NextContext
->WaitEvent
;
180 NextIrp
= CONTAINING_RECORD(NextContext
, IRP
, Tail
.Overlay
.DriverContext
);
181 ThreadContext
->WaitIrpArray
[ThreadContext
->Count
] = NextIrp
;
182 ThreadContext
->Count
++;
183 ThreadContext
->DeviceExt
->EmptyWaiterCount
--;
189 ExReleaseFastMutex(&Ccb
->DataListLock
);
194 /* someone has add a new wait request */
197 if (ThreadContext
->Count
== 1 && ThreadContext
->DeviceExt
->EmptyWaiterCount
>= MAXIMUM_WAIT_OBJECTS
)
199 /* it exist an other thread with empty wait slots, we can remove our thread from the list */
200 RemoveEntryList(&ThreadContext
->ListEntry
);
201 ThreadContext
->DeviceExt
->EmptyWaiterCount
-= MAXIMUM_WAIT_OBJECTS
- 1;
205 ExFreePool(ThreadContext
);
209 NpfsAddWaitingReadWriteRequest(IN PDEVICE_OBJECT DeviceObject
,
212 PLIST_ENTRY ListEntry
;
213 PNPFS_THREAD_CONTEXT ThreadContext
= NULL
;
218 PNPFS_CONTEXT Context
= (PNPFS_CONTEXT
)&Irp
->Tail
.Overlay
.DriverContext
;
219 PNPFS_DEVICE_EXTENSION DeviceExt
= (PNPFS_DEVICE_EXTENSION
)DeviceObject
->DeviceExtension
;
221 DPRINT("NpfsAddWaitingReadWriteRequest(DeviceObject %p, Irp %p)\n", DeviceObject
, Irp
);
223 KeLockMutex(&DeviceExt
->PipeListLock
);
225 ListEntry
= DeviceExt
->ThreadListHead
.Flink
;
226 while (ListEntry
!= &DeviceExt
->ThreadListHead
)
228 ThreadContext
= CONTAINING_RECORD(ListEntry
, NPFS_THREAD_CONTEXT
, ListEntry
);
229 if (ThreadContext
->Count
< MAXIMUM_WAIT_OBJECTS
)
233 ListEntry
= ListEntry
->Flink
;
235 if (ListEntry
== &DeviceExt
->ThreadListHead
)
237 ThreadContext
= ExAllocatePool(NonPagedPool
, sizeof(NPFS_THREAD_CONTEXT
));
238 if (ThreadContext
== NULL
)
240 KeUnlockMutex(&DeviceExt
->PipeListLock
);
241 return STATUS_NO_MEMORY
;
243 ThreadContext
->DeviceExt
= DeviceExt
;
244 KeInitializeEvent(&ThreadContext
->Event
, SynchronizationEvent
, FALSE
);
245 ThreadContext
->Count
= 1;
246 ThreadContext
->WaitObjectArray
[0] = &ThreadContext
->Event
;
249 DPRINT("Creating a new system thread for waiting read/write requests\n");
251 Status
= PsCreateSystemThread(&hThread
,
257 (PVOID
)ThreadContext
);
258 if (!NT_SUCCESS(Status
))
260 ExFreePool(ThreadContext
);
261 KeUnlockMutex(&DeviceExt
->PipeListLock
);
264 InsertHeadList(&DeviceExt
->ThreadListHead
, &ThreadContext
->ListEntry
);
265 DeviceExt
->EmptyWaiterCount
+= MAXIMUM_WAIT_OBJECTS
- 1;
267 IoMarkIrpPending(Irp
);
269 IoAcquireCancelSpinLock(&oldIrql
);
272 IoReleaseCancelSpinLock(oldIrql
);
273 Status
= STATUS_CANCELLED
;
277 (void)IoSetCancelRoutine(Irp
, NpfsReadWriteCancelRoutine
);
278 IoReleaseCancelSpinLock(oldIrql
);
279 ThreadContext
->WaitObjectArray
[ThreadContext
->Count
] = Context
->WaitEvent
;
280 ThreadContext
->WaitIrpArray
[ThreadContext
->Count
] = Irp
;
281 ThreadContext
->Count
++;
282 DeviceExt
->EmptyWaiterCount
--;
283 KeSetEvent(&ThreadContext
->Event
, IO_NO_INCREMENT
, FALSE
);
284 Status
= STATUS_SUCCESS
;
286 KeUnlockMutex(&DeviceExt
->PipeListLock
);
291 NpfsRead(IN PDEVICE_OBJECT DeviceObject
,
294 PFILE_OBJECT FileObject
;
296 NTSTATUS OriginalStatus
= STATUS_SUCCESS
;
298 PNPFS_CONTEXT Context
;
301 ULONG Information
= 0;
304 BOOLEAN IsOriginalRequest
= TRUE
;
307 DPRINT("NpfsRead(DeviceObject %p, Irp %p)\n", DeviceObject
, Irp
);
309 if (Irp
->MdlAddress
== NULL
)
311 DPRINT("Irp->MdlAddress == NULL\n");
312 Status
= STATUS_UNSUCCESSFUL
;
313 Irp
->IoStatus
.Information
= 0;
317 FileObject
= IoGetCurrentIrpStackLocation(Irp
)->FileObject
;
318 Ccb
= FileObject
->FsContext2
;
319 Context
= (PNPFS_CONTEXT
)&Irp
->Tail
.Overlay
.DriverContext
;
321 if (Ccb
->OtherSide
== NULL
)
323 DPRINT("Pipe is NOT connected!\n");
324 if (Ccb
->PipeState
== FILE_PIPE_LISTENING_STATE
)
325 Status
= STATUS_PIPE_LISTENING
;
326 else if (Ccb
->PipeState
== FILE_PIPE_DISCONNECTED_STATE
)
327 Status
= STATUS_PIPE_DISCONNECTED
;
329 Status
= STATUS_UNSUCCESSFUL
;
330 Irp
->IoStatus
.Information
= 0;
334 if (Ccb
->Data
== NULL
)
336 DPRINT1("Pipe is NOT readable!\n");
337 Status
= STATUS_UNSUCCESSFUL
;
338 Irp
->IoStatus
.Information
= 0;
342 ExAcquireFastMutex(&Ccb
->DataListLock
);
344 if (IoIsOperationSynchronous(Irp
))
346 InsertTailList(&Ccb
->ReadRequestListHead
, &Context
->ListEntry
);
347 if (Ccb
->ReadRequestListHead
.Flink
!= &Context
->ListEntry
)
349 KeInitializeEvent(&Event
, SynchronizationEvent
, FALSE
);
350 Context
->WaitEvent
= &Event
;
351 ExReleaseFastMutex(&Ccb
->DataListLock
);
352 Status
= KeWaitForSingleObject(&Event
,
357 if (!NT_SUCCESS(Status
))
361 ExAcquireFastMutex(&Ccb
->DataListLock
);
363 Irp
->IoStatus
.Information
= 0;
368 if (IsListEmpty(&Ccb
->ReadRequestListHead
) ||
369 Ccb
->ReadRequestListHead
.Flink
!= &Context
->ListEntry
)
371 /* this is a new request */
372 Irp
->IoStatus
.Information
= 0;
373 Context
->WaitEvent
= &Ccb
->ReadEvent
;
374 InsertTailList(&Ccb
->ReadRequestListHead
, &Context
->ListEntry
);
375 if (Ccb
->ReadRequestListHead
.Flink
!= &Context
->ListEntry
)
377 /* there was already a request on the list */
378 IoAcquireCancelSpinLock(&oldIrql
);
381 IoReleaseCancelSpinLock(oldIrql
);
382 RemoveEntryList(&Context
->ListEntry
);
383 ExReleaseFastMutex(&Ccb
->DataListLock
);
384 Status
= STATUS_CANCELLED
;
387 (void)IoSetCancelRoutine(Irp
, NpfsReadWriteCancelRoutine
);
388 IoReleaseCancelSpinLock(oldIrql
);
389 ExReleaseFastMutex(&Ccb
->DataListLock
);
390 IoMarkIrpPending(Irp
);
391 Status
= STATUS_PENDING
;
399 Buffer
= MmGetSystemAddressForMdl(Irp
->MdlAddress
);
400 Information
= Irp
->IoStatus
.Information
;
401 Length
= IoGetCurrentIrpStackLocation(Irp
)->Parameters
.Read
.Length
;
402 ASSERT (Information
<= Length
);
403 Buffer
= (PVOID
)((ULONG_PTR
)Buffer
+ Information
);
404 Length
-= Information
;
405 Status
= STATUS_SUCCESS
;
409 if (Ccb
->ReadDataAvailable
== 0)
411 if (Ccb
->PipeState
== FILE_PIPE_CONNECTED_STATE
)
413 ASSERT(Ccb
->OtherSide
!= NULL
);
414 KeSetEvent(&Ccb
->OtherSide
->WriteEvent
, IO_NO_INCREMENT
, FALSE
);
416 if (Information
> 0 &&
417 (Ccb
->Fcb
->ReadMode
!= FILE_PIPE_BYTE_STREAM_MODE
||
418 Ccb
->PipeState
!= FILE_PIPE_CONNECTED_STATE
))
422 if (Ccb
->PipeState
!= FILE_PIPE_CONNECTED_STATE
)
424 DPRINT("PipeState: %x\n", Ccb
->PipeState
);
425 Status
= STATUS_PIPE_BROKEN
;
428 ExReleaseFastMutex(&Ccb
->DataListLock
);
429 if (IoIsOperationSynchronous(Irp
))
431 /* Wait for ReadEvent to become signaled */
433 DPRINT("Waiting for readable data (%wZ)\n", &Ccb
->Fcb
->PipeName
);
434 Status
= KeWaitForSingleObject(&Ccb
->ReadEvent
,
439 DPRINT("Finished waiting (%wZ)! Status: %x\n", &Ccb
->Fcb
->PipeName
, Status
);
440 ExAcquireFastMutex(&Ccb
->DataListLock
);
444 Context
= (PNPFS_CONTEXT
)&Irp
->Tail
.Overlay
.DriverContext
;
446 Context
->WaitEvent
= &Ccb
->ReadEvent
;
447 Status
= NpfsAddWaitingReadWriteRequest(DeviceObject
, Irp
);
449 if (NT_SUCCESS(Status
))
451 Status
= STATUS_PENDING
;
453 ExAcquireFastMutex(&Ccb
->DataListLock
);
457 ASSERT(IoGetCurrentIrpStackLocation(Irp
)->FileObject
!= NULL
);
458 if (Ccb
->Fcb
->ReadMode
== FILE_PIPE_BYTE_STREAM_MODE
)
460 DPRINT("Byte stream mode\n");
461 /* Byte stream mode */
462 while (Length
> 0 && Ccb
->ReadDataAvailable
> 0)
464 CopyLength
= min(Ccb
->ReadDataAvailable
, Length
);
465 if ((ULONG_PTR
)Ccb
->ReadPtr
+ CopyLength
<= (ULONG_PTR
)Ccb
->Data
+ Ccb
->MaxDataLength
)
467 memcpy(Buffer
, Ccb
->ReadPtr
, CopyLength
);
468 Ccb
->ReadPtr
= (PVOID
)((ULONG_PTR
)Ccb
->ReadPtr
+ CopyLength
);
469 if (Ccb
->ReadPtr
== (PVOID
)((ULONG_PTR
)Ccb
->Data
+ Ccb
->MaxDataLength
))
471 Ccb
->ReadPtr
= Ccb
->Data
;
476 TempLength
= (ULONG
)((ULONG_PTR
)Ccb
->Data
+ Ccb
->MaxDataLength
- (ULONG_PTR
)Ccb
->ReadPtr
);
477 memcpy(Buffer
, Ccb
->ReadPtr
, TempLength
);
478 memcpy((PVOID
)((ULONG_PTR
)Buffer
+ TempLength
), Ccb
->Data
, CopyLength
- TempLength
);
479 Ccb
->ReadPtr
= (PVOID
)((ULONG_PTR
)Ccb
->Data
+ CopyLength
- TempLength
);
482 Buffer
= (PVOID
)((ULONG_PTR
)Buffer
+ CopyLength
);
483 Length
-= CopyLength
;
484 Information
+= CopyLength
;
486 Ccb
->ReadDataAvailable
-= CopyLength
;
487 Ccb
->WriteQuotaAvailable
+= CopyLength
;
492 if (Ccb
->PipeState
== FILE_PIPE_CONNECTED_STATE
)
494 KeSetEvent(&Ccb
->OtherSide
->WriteEvent
, IO_NO_INCREMENT
, FALSE
);
496 KeResetEvent(&Ccb
->ReadEvent
);
502 DPRINT("Message mode\n");
505 if (Ccb
->ReadDataAvailable
)
507 /* Truncate the message if the receive buffer is too small */
508 CopyLength
= min(Ccb
->ReadDataAvailable
, Length
);
509 memcpy(Buffer
, Ccb
->Data
, CopyLength
);
512 DPRINT("Length %d Buffer %x\n",CopyLength
,Buffer
);
513 HexDump((PUCHAR
)Buffer
, CopyLength
);
516 Information
= CopyLength
;
518 if (Ccb
->ReadDataAvailable
> Length
)
520 memmove(Ccb
->Data
, (PVOID
)((ULONG_PTR
)Ccb
->Data
+ Length
),
521 Ccb
->ReadDataAvailable
- Length
);
522 Ccb
->ReadDataAvailable
-= Length
;
523 Status
= STATUS_MORE_ENTRIES
;
527 KeResetEvent(&Ccb
->ReadEvent
);
528 if (Ccb
->PipeState
== FILE_PIPE_CONNECTED_STATE
)
530 KeSetEvent(&Ccb
->OtherSide
->WriteEvent
, IO_NO_INCREMENT
, FALSE
);
532 Ccb
->ReadDataAvailable
= 0;
533 Ccb
->WriteQuotaAvailable
= Ccb
->MaxDataLength
;
543 Irp
->IoStatus
.Information
= Information
;
544 Irp
->IoStatus
.Status
= Status
;
546 ASSERT(IoGetCurrentIrpStackLocation(Irp
)->FileObject
!= NULL
);
548 if (IoIsOperationSynchronous(Irp
))
550 RemoveEntryList(&Context
->ListEntry
);
551 if (!IsListEmpty(&Ccb
->ReadRequestListHead
))
553 Context
= CONTAINING_RECORD(Ccb
->ReadRequestListHead
.Flink
, NPFS_CONTEXT
, ListEntry
);
554 KeSetEvent(Context
->WaitEvent
, IO_NO_INCREMENT
, FALSE
);
556 ExReleaseFastMutex(&Ccb
->DataListLock
);
557 IoCompleteRequest(Irp
, IO_NO_INCREMENT
);
559 DPRINT("NpfsRead done (Status %lx)\n", Status
);
564 if (IsOriginalRequest
)
566 IsOriginalRequest
= FALSE
;
567 OriginalStatus
= Status
;
569 if (Status
== STATUS_PENDING
)
571 ExReleaseFastMutex(&Ccb
->DataListLock
);
572 DPRINT("NpfsRead done (Status %lx)\n", OriginalStatus
);
573 return OriginalStatus
;
575 RemoveEntryList(&Context
->ListEntry
);
576 IoCompleteRequest(Irp
, IO_NO_INCREMENT
);
577 if (IsListEmpty(&Ccb
->ReadRequestListHead
))
579 ExReleaseFastMutex(&Ccb
->DataListLock
);
580 DPRINT("NpfsRead done (Status %lx)\n", OriginalStatus
);
581 return OriginalStatus
;
583 Context
= CONTAINING_RECORD(Ccb
->ReadRequestListHead
.Flink
, NPFS_CONTEXT
, ListEntry
);
584 Irp
= CONTAINING_RECORD(Context
, IRP
, Tail
.Overlay
.DriverContext
);
589 Irp
->IoStatus
.Status
= Status
;
591 if (Status
!= STATUS_PENDING
)
593 IoCompleteRequest(Irp
, IO_NO_INCREMENT
);
595 DPRINT("NpfsRead done (Status %lx)\n", Status
);
601 NpfsWrite(PDEVICE_OBJECT DeviceObject
,
604 PIO_STACK_LOCATION IoStack
;
605 PFILE_OBJECT FileObject
;
606 PNPFS_FCB Fcb
= NULL
;
607 PNPFS_CCB Ccb
= NULL
;
610 NTSTATUS Status
= STATUS_SUCCESS
;
617 DPRINT("NpfsWrite()\n");
619 IoStack
= IoGetCurrentIrpStackLocation(Irp
);
620 FileObject
= IoStack
->FileObject
;
621 DPRINT("FileObject %p\n", FileObject
);
622 DPRINT("Pipe name %wZ\n", &FileObject
->FileName
);
624 Ccb
= FileObject
->FsContext2
;
625 ReaderCcb
= Ccb
->OtherSide
;
628 Length
= IoStack
->Parameters
.Write
.Length
;
629 Offset
= IoStack
->Parameters
.Write
.ByteOffset
.u
.LowPart
;
632 if (Irp
->MdlAddress
== NULL
)
634 DPRINT("Irp->MdlAddress == NULL\n");
635 Status
= STATUS_UNSUCCESSFUL
;
640 if (ReaderCcb
== NULL
)
642 DPRINT("Pipe is NOT connected!\n");
643 if (Ccb
->PipeState
== FILE_PIPE_LISTENING_STATE
)
644 Status
= STATUS_PIPE_LISTENING
;
645 else if (Ccb
->PipeState
== FILE_PIPE_DISCONNECTED_STATE
)
646 Status
= STATUS_PIPE_DISCONNECTED
;
648 Status
= STATUS_UNSUCCESSFUL
;
653 if (ReaderCcb
->Data
== NULL
)
655 DPRINT("Pipe is NOT writable!\n");
656 Status
= STATUS_UNSUCCESSFUL
;
661 Status
= STATUS_SUCCESS
;
662 Buffer
= MmGetSystemAddressForMdl (Irp
->MdlAddress
);
664 ExAcquireFastMutex(&ReaderCcb
->DataListLock
);
666 DPRINT("Length %d Buffer %x Offset %x\n",Length
,Buffer
,Offset
);
667 HexDump(Buffer
, Length
);
672 if (ReaderCcb
->WriteQuotaAvailable
== 0)
674 KeSetEvent(&ReaderCcb
->ReadEvent
, IO_NO_INCREMENT
, FALSE
);
675 if (Ccb
->PipeState
!= FILE_PIPE_CONNECTED_STATE
)
677 Status
= STATUS_PIPE_BROKEN
;
678 ExReleaseFastMutex(&ReaderCcb
->DataListLock
);
681 ExReleaseFastMutex(&ReaderCcb
->DataListLock
);
683 DPRINT("Waiting for buffer space (%S)\n", Fcb
->PipeName
.Buffer
);
684 Status
= KeWaitForSingleObject(&Ccb
->WriteEvent
,
689 DPRINT("Finished waiting (%S)! Status: %x\n", Fcb
->PipeName
.Buffer
, Status
);
691 ExAcquireFastMutex(&ReaderCcb
->DataListLock
);
693 * It's possible that the event was signaled because the
694 * other side of pipe was closed.
696 if (Ccb
->PipeState
!= FILE_PIPE_CONNECTED_STATE
)
698 DPRINT("PipeState: %x\n", Ccb
->PipeState
);
699 Status
= STATUS_PIPE_BROKEN
;
700 ExReleaseFastMutex(&ReaderCcb
->DataListLock
);
705 if (Fcb
->WriteMode
== FILE_PIPE_BYTE_STREAM_MODE
)
707 DPRINT("Byte stream mode\n");
708 while (Length
> 0 && ReaderCcb
->WriteQuotaAvailable
> 0)
710 CopyLength
= min(Length
, ReaderCcb
->WriteQuotaAvailable
);
711 if ((ULONG_PTR
)ReaderCcb
->WritePtr
+ CopyLength
<= (ULONG_PTR
)ReaderCcb
->Data
+ ReaderCcb
->MaxDataLength
)
713 memcpy(ReaderCcb
->WritePtr
, Buffer
, CopyLength
);
714 ReaderCcb
->WritePtr
= (PVOID
)((ULONG_PTR
)ReaderCcb
->WritePtr
+ CopyLength
);
715 if ((ULONG_PTR
)ReaderCcb
->WritePtr
== (ULONG_PTR
)ReaderCcb
->Data
+ ReaderCcb
->MaxDataLength
)
717 ReaderCcb
->WritePtr
= ReaderCcb
->Data
;
722 TempLength
= (ULONG
)((ULONG_PTR
)ReaderCcb
->Data
+ ReaderCcb
->MaxDataLength
- (ULONG_PTR
)ReaderCcb
->WritePtr
);
723 memcpy(ReaderCcb
->WritePtr
, Buffer
, TempLength
);
724 memcpy(ReaderCcb
->Data
, Buffer
+ TempLength
, CopyLength
- TempLength
);
725 ReaderCcb
->WritePtr
= (PVOID
)((ULONG_PTR
)ReaderCcb
->Data
+ CopyLength
- TempLength
);
728 Buffer
+= CopyLength
;
729 Length
-= CopyLength
;
730 Information
+= CopyLength
;
732 ReaderCcb
->ReadDataAvailable
+= CopyLength
;
733 ReaderCcb
->WriteQuotaAvailable
-= CopyLength
;
738 KeSetEvent(&ReaderCcb
->ReadEvent
, IO_NO_INCREMENT
, FALSE
);
739 KeResetEvent(&Ccb
->WriteEvent
);
745 DPRINT("Message mode\n");
748 CopyLength
= min(Length
, ReaderCcb
->WriteQuotaAvailable
);
749 memcpy(ReaderCcb
->Data
, Buffer
, CopyLength
);
751 Information
= CopyLength
;
752 ReaderCcb
->ReadDataAvailable
= CopyLength
;
753 ReaderCcb
->WriteQuotaAvailable
= 0;
758 KeSetEvent(&ReaderCcb
->ReadEvent
, IO_NO_INCREMENT
, FALSE
);
759 KeResetEvent(&Ccb
->WriteEvent
);
765 ExReleaseFastMutex(&ReaderCcb
->DataListLock
);
768 Irp
->IoStatus
.Status
= Status
;
769 Irp
->IoStatus
.Information
= Information
;
771 IoCompleteRequest(Irp
, IO_NO_INCREMENT
);
773 DPRINT("NpfsWrite done (Status %lx)\n", Status
);